Hypofractionated High-Dose Radiation Therapy for Prostate Cancer: Long-Term Results of a Multi-Institutional Phase II Trial - Abstract

PURPOSE: To report late gastrointestinal (GI) and genitourinary (GU) toxicity, biochemical and clinical outcomes, and overall survival after hypofractionated radiation therapy for prostate cancer (PC).

METHODS AND MATERIALS: Three institutions included 113 patients with T1 to T3N0M0 PC in a phase II study. Patients were treated with 56 Gy in 16 fractions over 4 weeks. Late toxicity was scored using Radiation Therapy Oncology Group/European Organization for Research and Treatment of Cancer criteria extended with additional symptoms. Biochemical outcome was reported according to the Phoenix definition for biochemical failure.

RESULTS: The incidence of late GI and GU toxicity was low. The 3-year actuarial risk of developing late GU and GI toxicity of grade ≥2 was 13% and 8% respectively. Five-year biochemical non-evidence of disease (bNED) was 94%. Risk group, T stage, and deviation from planned hormone treatment were significant predictive factors for bNED. Deviation from hormone treatment remained significant in multivariate analysis. Five-year clinical non evidence of disease and overall survival was 95% and 91% respectively. No patient died from PC.

CONCLUSIONS: Hypofractionated high-dose radiation therapy is a valuable treatment option for patients with PC, with excellent biochemical and clinical outcome and low toxicity.

Written by:
Fonteyne V, Soete G, Arcangeli S, De Neve W, Rappe B, Storme G, Strigari L, Arcangeli G, De Meerleer G   Are you the author?
Department of Radiotherapy, Ghent University Hospital, Ghent, Belgium

Reference: Int J Radiat Oncol Biol Phys. 2012 Jun 5
doi: 10.1016/j.ijrobp.2012.04.012


PubMed Abstract
PMID: 22677370